Stylishly keep tabs on your keys with the mad man leather Bluetooth keychain tracker. When this key finder is connected to your phone, your phone will make a sound alert whenever the key-finder‚äôs button is pressed. Alternatively, on pressing the ‚ option on the app, the key-finder will beep and its led will flash. Mad man, masters of men's gifts. Material: genuine leather/metal. Dimensions: 4.75" x 1.25".